Stripper for rotary perforating-machines.



No. 716,895. Patented Dec. 30, I902. r

H. S. HEWSTUN.

STBIPPER FOB ROTARY PERFOBATING MACHINES.

(Application filed Mar. 29, 1901.)

(No Model.)

UNITED STATES Y PATENT FFICE.

IIOWARD S. HEVSTON, OF CAMDEN, NEW JERSEY, ASSIGNOH TO CEPHAS R. CARVER, OF PHILADELPHIA, PENNSYLVANIA.

STRIPPER FOR ROTARY PERFORATlNG-MACHINES.

} SPECIFICATION forming part of Letters Patent No. 716,89 5, dated December 30, 1902- To all whom it TYbU/y concern:

Be it known that I, HOWARD S. Hnws'ron, a citizen of the United States, and a resident of Camden, State of New Jersey, have invented certain new and useful Improvements in Strippers for Rotary Perforating-Machines, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification.

My invention relates to certain improvements in stripping devices for use on rotary perforating and cutting machines.

The object of myinvention is to provide a I 5 stripper so constructed as to fit closely on each side of the cutting or perforating device and prevent the paper from adhering to the same and guide it to the feed-rollers.

A further object is to provide means for holding and adjusting the stripper and to generally improve the construction of the device.

The invention consists in construction and arrangement, substantially as herein described and illustrated, and as particularly pointed out in the claims made hereto.

Referring to the accompanying drawings, which form a part of this specification, Figure 1 is a sectional elevation of a portion of a rotary perforating-machine having my stripperv applied thereto. Fig. 2 is a detail section through the meeting edges of the male and female dies, showing thestripper-blades in section on each side otthe perforatingknives. Fig. 3 is a detail perspective view of the stripper and its holder on an enlarged scale. Fig. 4 is a sectional elevation through the holding device.

In carrying out my invention I employ two fiat bars Ct, placed side by side and having a short spacing-plate Z) placed between them near the rear ends, thus providing a narrow open space or slot, as 0, between the forward portions of the said bars 66. The upper forward edges of the bars Ct are curved on an perforating cutters d, as clearly illustrated in Fig. 3 ot' the drawings. The object of this construction is to allow the bars a to fit between the male die A and the female die 13 of the perforating-machine in the manner illustrated in detail in Fig. 2 of the drawings,

holderf,

are corresponding in radius to that of' the pe riphery of the male die A, which carries the Application filed March 29, 1901. Serial Ila-53.39L (No models the cutters d entering the slot 0 at the point where they operate on the paper.

Instead of having the stripper composed of two separate bars, as a, ings,) and employing the spacing-plate b between the two, so as to provide'the narrow slot 0, this stripper could he made of a single piece of metal, and the slot 0 could be out or milled in the same, as will be readily understood.

The holding device e comprises a tubular sleeve f, having a horizontally-disposed baseplate 9 formed on its under side, to which is secured the shoe h. A slot i is cut in the lower portion of the sleeve f and extends through the base-plate g, the said slot being of a Width and depth sufficient to receive the stripper-bars a, as will be described hereinafter. The shoe cured on the under side otthe baseplate g and has its forward end slotted and curved upwardly on each side of the stripper a. The sleeve f fits on a supporting-shaft 7', which is slightly smaller in diameter than the bore of the said sleeve, and a set-screw it is provided in the sleeve for clamping the same to the shaft j. The stripper Ct passes through the slot rl and through the slotted end of the shoe h, a portion of its upper edge extending within the bore of the sleeve f, so that when the setscrew it is adjusted it will draw the sleeve up and cause the stripper to bind tightly against the shaft j, and thus securely hold it in po sition.

Extending through the rear end of the stripper a is a pin Z, which projects from each side of said stripper, pose of which is to limit the inward movement of the same when inserting it in its and thus prevent the forward curved ends of the arms a from coming in contact with the periphery of the die A.

In operation the stripper is adjusted through the slot in the holder until the points of the bars a enter between the two dies A andB- on each side of the cutter, the pins Z striking 'f to its base-plate 9, thus preventing said stripper from entering too far between the dies. After the stripper is set in its proper position it is secured byineans of the setscrew 7c, above described'f'These arms or (see Figs. 1 and 4,) the pur (shown in the draw- I h is riveted or otherwise se-' against the casting which connects the sleeve 4 bars a pull the paper away from the cutters d and prevent said papers from sticking to the said cutters and curling up, and the curved-up ends of the shoe h serve as a guide to direct the paper to the feed-rolls located in the rear of the holding device. ing up the set-screw 7c the sleeve fis allowed to drop slightly, and the top of the strippers then cease to bind against the shaft j, and the sleeve is loose on the shaft and free to be moved to any position on said shaft. The strippers after the set-screw is loosened up are also loose in the slot 1' and can be readily withdrawn from such support or adjusted longitudinally to bring them closer to or farther away from the dies.

This construction and arrangement of stripper is especially advantageous when it is desired to perforate the paper very closeto its edges, the bars a fitting closely to the cutters on each side thereof and preventing the paper from tearing while the perforating or cutting implements are acting on the paper close to one edge of the same.

Having thus described my invention, what I claim, and desire to secure by Letters Patent, is

1. In combination with the rotary cutters of a perforating-machine, a stripper having two substantially horizontally disposed straight arms adapted to fit closely on each side of the cutters at the point where they operate on the paper, and means for holding and adjusting said strippers longitudinally to bring them closer to or farther away from the cutters, substantially as described.

2. The combination with the male and female dies of a rotary perforating-machine, of a stripper comprising a pair of straight flat bars spaced so as to form a slot between their forward ends, curved upper edges formed on the forward portions of said bars, the radius of said curve corresponding substantially to the radius of the cutter-holding die, the said curved ends adapted to fit between the two dies on each side of the perforating-knife,

By loosenand means for securing the said stripper in position and adjusting the same toward and from the disk, substantially as described.

3. Astripper for perforating-machines comprising two fiat bars spaced apart sufficiently to allow a perforating-knife to pass between them, curved edges formed on the upper forward ends of said bars for allowing them to pass between the two dies of the machine, the said curved edges conforming to the periphery of the knife-holding die, and means for adjustably securing the stripper on the machine, substantially as described.

4. The combination with a rotary perforating-machine, of a stripper having two arms spaced apart so as to fit closely on each side of the perforating-tools, a holder supported by the machine-frame in which the stripper is adjustably mounted, and stops carried by the stripper adapted to strike against the holder and limit the adjustment of said stripper toward the cutter-dies, substantially as described.

5. The combination with a rotary perforating-machine, of a stripper comprising two arms sufficiently spaced apart to allow the perforating knife to pass between them, curved forward edges formed on the said arms for allowing them to pass between the two dies of the machine, a holding device for the stripper supported in the frame of the machine, aslotted opening in said holding device through which the stripper passes, and stops carried by the stripper adapted to strike against the holder and limit its movement toward the cutter-dies, substantially as described.

6. The combination of the stripper-bars, a, adapted to fit closely on each side of a perforating knife, a hollow sleeve, f, loosely mounted on a shaft carried by the machineframe, a slotted opening, 1}, provided in the lower portion of said sleeve through which the stripper-bars pass, a shoe, h, secured to the under side of the sleeve, f, and bearing against the lower edge of the stripper-bars, and a set-screw, 7t, threaded into the sleevef, adapted to impinge against the shaft and draw the sleeve and strippers tightly against said shaft for securing the same in position, substantially as described. i

In witness whereof I have hereunto set my hand this 25th day of March, A. D. 1901.

HOWARD S. I-IEWSTON. 

